of the ^^ Genus " Peneu?. 521 



ouly ventrally, by the buttress of the postanteuiiular (an- 

 tennal) spine. 



Carapace with longitudinal and transverse sutures as in 

 most Parapenei, but the longitudinal suture never reaches 

 the posterior border. 



Antennular flagella either long or short. Endopodite of 

 maxillules (first maxillae) short, unsegmented. Petaloid 

 exopodites are present on all the thoracic legs, 



Epipodites absent from the third maxillipeds as well as 

 from the last three thoracic appendages, sometimes absent 

 from all the legs. No pleurobranchise on the last two 

 thoracic somites. 



Andricum symmetrical. The third maxillipeds and fifth 

 pair of legs are not known to be modified in the male. 



The branchial formula is : — 



List of the Species o/ Parapeneopsis, Wood Mason. 



I. Epipodites present on the second maxillipeds and first two pairs of legs. 

 2'elson ivith lateral marginal spinelets. 



1. Parapeneopsis stylifera (Edw.), Milne-Edwards, Hist. Nat. Crust, ii. 



p. 418. — Coasts of India. 

 Parapeneopsis stylifera, vnr. coromandelica, nor. — East coast of India. 



II. Epipodites present on the second niaxillipeds and first two pairs of legs, 

 ielson tcith small lateral marginal spinelets only as an occasional 

 anomaly. 



2. Parapeneopsis sculptilis (Heller), ' Novara ' Crust, p. 122, pi. xi. lig. 1. 



— Seas of India and East Indian Archipelago. 

 Parapeneopsis sculjjtilis, var. Hardwickii, Miers, P. Z. S. 1878, p. 300, 



pi. xvii. fig. 1. — Coasts of India. 

 Parapeneopsis sculptilis, var. cultrirostris, nov. — Coromandel coast. 



3. Parapeneopsis cornuta (Kishinouye), .lourn. Fish. Bur., Tokyo, viii. 



lyOO, no. 1, p. 23.— Japan; India ? 



