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(S. I. Smith) from the Caribbean Sea is regarded by Professor Bouvier as identical with Pen. 

 serrahis. Pen. pubescens (Stimpson) is known from St. Thomas and perhaps this species is 

 identical with Pen. pubesce^is Bouv. from the East Atlantic. Very closely related to this species, 

 if not identical, is Pen. Goodei (S. I. Smith), a form recorded not only from Bermuda, the 

 coast off Florida, the island of Sombrero and the coast of Brazil, but also from the Bay of 

 Panama. All the others are indopacific sjDecies. Pen. monoccros (Fabr.) and Pen. Richtersii 

 (Miers) are perhaps the most widely ranging species. Pen. nwnoceros^ indeed, occurs on the 

 west and on the east coast of British India, in the Gulf of Bengal, at Hongkong, in the seas 

 of Japan and it is known from several Stations in the East Indian Archipelago ; this species 

 has been recorded by Hilgendorf from Quellimane on the coast of Mozambique and by 

 Haswell from the Endeavour River, Queensland. Pen. Richtersii from the Western Indian 

 Ocean is recorded by Miss Rathbun from the Hawaiian Islands and has been captured by 

 the "Siboga" off the island of Banda. Pen. longipes (Paulson), Stebbingii (Nob.) and Vaillanti 

 (Nob.) are inhabitants of the Red Sea, while Pen. cognatiis (Nob.) and Pen. consobrin-ns (Nob.) 

 have still only been observed at Djibouti. Pen. perlanini (Nob.) is known from the Persian Gulf. 

 Pen. coniger (W.-Mas.), gallensis (Pearson), Deschainpsii (Nob.), Dobsoni (Miers) and Lysianassa 

 (de Man) are found at different localities on the coasts of Briti.sh India, Ceylon and the Gulf 

 of Bengal. Pen. affinis (H. M.-Edw.), with which Pen. viutatits (Lanch.) from the Malay 

 Peninsula is perhaps identical, ranges from the west coast of India (Karachi) until to Japan 

 and Pen. mogiensis Rathb. from Japan has also been observed in the Gulf of Bengal and off 

 the Malabar coast. Pen. avirostris (Dana), brevicornis (H. M.-Edw.), siridulans (W.-Mas.) and 

 Pen. coniger, var. andamanensis (W.-Mas.) are species observed both in the Gulf of Bengal and 

 in the East Indian Archipelago. The largest number of species of this genus are at present 

 known to occur in the East Indian Archipelago, for which knowledge we are greatly indebted 

 to the investigations of the "Siboga"; these i8 species are the following: 



Section I. affinis (H. M.-Edw.). elegans de Man. 



avirostris (Dana). incisipes (Sp. Bate). 



brevicornis (H. M.-Edw.). monoccros (Fabr.). 



Section II. Borradailei de Man. philippinensis (Sp. Bate) ^). 



coniger (W.-Mas.), var. andamanensis (W.-Mas.). qiiinquedentatus de Man. 



distinct lis de Man. KicJitersii (Miers). 



Evermanni (Rathb.). Challengeri de Man, n. nom. 



gracilis (Dana). , Sibogac de Man. 



hilarulus de Man. stridnlans (W.-Mas.). 



With regard to these species we must still consider that Pen. Evermanni was first 

 recorded from the Hawaiian Islands, while Pe7i. Challengeri has previously been observed 

 by the "Challenger" in Torres Strait and at the Fiji Islands, for this species is the same as 

 that which was described by Spence Bate under the name of Penaeus serratus. 



l) This species seems to be identical witli Pen. Fhilippii Sp. Bate 1881 from tlic Philippine Islands. 



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