CALLIOP^A. 249 



^olis gymnota. 



Plate XVI. Figs. 238-241. 



Animal small, tapering to a fine point, watery white ; tentacles short, the pos- 

 terior pair minutely serrated ; branchiie in seven lateral clusters of about five 

 each, slightly club-shaped, having a reddish-brown centre. 



Eolis [Tergipcs, Cuv.) f/i/mnota, Couthouy, Bost. Journ. Nat. Hist. ii. 69, pi. 1, fig. 3. 

 Eolidia (iipnnota, De Kav, N. Y. Moll. 10, pi. 5, fig. 97 (184.3). 

 yEolis (/j/innota, Stimpson, Check Li.sts, 4 (18G0). 



Body slender and tapering to a very fine point, of a pale, watery 

 drab color ; head small, rounded, with a distinct neck ; mouth 

 small ; dorsal tentacles short, linear, truncated, with very fine 

 wrinkles or serratures at the sides ; oral tentacles rather longer, 

 pointed. Foot transparent, as wide as the body, anterior angles 

 rounded. Branchise short, slightly enlarged towards the tip, pale 

 straw color, very transparent, enclosing the reddish-brown or um- 

 ber-colored glandidar body, which gives the general color to the 

 wliole ; they are arranged in seven pairs of clusters of about five 

 each, along the lateral margins, leaving a large portion of the back 

 exposed, the second and third pairs rather longer than the others ; 

 tlie l)ranchia3 are usually carried spreading outwards rather than 

 folded over the l)ack. Length, about an inch ; breadth, one tenth 

 of an inch. ^. ^„„ 



Fig. 520. 



Found in Charles River, near Craigie's Bridge, Boston ; at 

 Warren Bridge, al)Out the roots of Tubularia, October and 

 Novem])er, IS-IT ( Couf/io/i//}. 



This species, which thus far seems to 1)0 rare, is nearly 

 allied to JE. conciiDia, Alder and Hancock. In that species 

 the branchias are fusiform and white-ti[)ped, and have a ])e- 

 culiar satin lustre. Tlio dorsal tentacles are longer than 

 the oral. It seems to be a sluggish species. The ova are 'tlluwu^, 

 deposited about the roots of Tubularia in vermiform masses ; '•'""""'"y- 

 four or five bunches are laid by an individual. They are laid in 

 November. 



Genus CAI.I.IOP.EA, D'Orbigny. 18.37. 



Head without tentacles ; lainal feelers very long and tapering. 

 Gills [)yriform, placed in longitudinal lines. Front of foot an- 

 gular. 



