them .in.l ./ lithotryae. The fust was collected between Borneo 



and Lomb i depdi m., the id N.W. from the Key Islands at po m. depth, 



the third n a Island at .1 depth of 894 m. attached to the valves ol Lithotrya 



h.is, not unlike ./. quadrata Auriv., horny, nearly quite hidden 



i ;u once by the ver) peculiar structure of the capitulum; 



far .is the structure i»l" the 5' 11 and 6°" cirrus is concerned between 



the with quite normal rami and those in which the inner ramus is quite rudimentary. 



Including the from the "Siboga" we now have ig species of Alepas in all. 



parts or valves which facilitate the separation of the species in other 



1 lakes ihis distinction a troublesome one in Alepas. The ontward 



apitulum, the length and proportions of the peduncle are liable to change with 



. under the influence of the fluid used for the conservation etc. The question whether 



all ti ribed are really good species in the case of Alepas is more difHcult to answer 



than for the other genera. Yet, considering the circumstances under which they were taken 



rent objects or animals to which they were found attached. different depths, geograph 

 distribution) there can l>e no doubt, I think, but that most of the species are really different forms. 

 The following table enumerates all the species at present known, arranged accordin^ to 

 their bathymetric occurrence with indication of their geographical distribution. The species found 

 in the Malay Archipelago are marked with an asterisk. 



Alepas Lankesteri Gruvel. 1465 m. Mona Channel, West Indies. 



epas ovalis n. sp. 984 m. \Y. from the Key Islands. 

 Alepas pcdiiiicitlala Hoek. 740 m. Ott New South Wales. 



pas morula n. sp. 538 m. Between Borneo and Lombok. 

 Alepas minuta Philippi. 355 — 250 — 100 m. Mediterranean, Atlantic ( 'cean. 

 Alepas xenophorae Annandale. 333 m. S. W. Coast of (English) India. 

 ras Annandale. 290 m. Bali Straks. 

 pas tennis n. sp. 204 m. South of Ceram. 

 'Al pas inter media n. sp. 90 m. N.W. from Key Islands. 

 Alepas japonica Aurivillius. 80 m. Japan Sea, Hirado Street. 

 'Alipas malaysiana Annandale. 55 m. Gaspar Straits. 



epas lithotryae n. sp. Reef. Near South Lucipara Island. 

 AUpas tubulosa Quöy <!v Gaimard. On Palinurus ('Coast'-). New Zealand. 

 *AUpas quadrata Aurivillius. On Palinurus (Coast?). Thousand Islands Java). 

 Alepas cornuta Darwin. ? West Indies: St. Vincent. 



Alepas parasita Sander Rang. Surface (on Medusae). Mediterranean, Atlantic Ocean. 

 Alepa Belli Gruvel. ? Cuba. 



Alepas microstoma Gruvel. "'Madeira. 



f indica Gruvel. Surface (on floating wood). Singapore and Nicobars. 



that of the [9 species described in the literature 9 or about the half have 

 I in the Malay Archipelago; in this region, the genus may indeed be called prolific. 



34 



